Ophthalmic mounting



Oct. 2, 41945. A.' EYL'LESTAD 2,385,975

oPH'rHALuIc' MOUNTING Filed Jan. 13, 1944 1 GRHA'RD AELLESTAD y IVEN RB, m, 92,

ATTOR S NLYga/corporation of NewfYqrkf Application January. 13, 19st;sem N9. l 3 Claims. (Cl.'

'This invention relates to ophthalmic mountingsa-nd more particiilarlyithas. reference'to means for` detachably securing `lenses in mount.-

Onei of the objects of my inventionfis to provide an improved ophthalmicmonntingwherein the lenses are detachably held by a resilient armcarrying lugs which engage openings in the edges of the lenses. Anotherobject is to provide an ophthalmic mounting wherein the lens ismengagedby holding means secured to an arm'and the front surface of the lens isurged forwardly by resilient means against a part on said holding means.These and other objects and advantages reside in certain novel featuresof construction, arrangement and combination of parts as willhereinafter be more fully described and pointed out in the appendedclaims.

Referring to the drawing:

Fig. 1 is a front view of an ophthalmic mounting embodying my invention.

Fig. 2 is an enlarged fragmentary side view of the lug and strap, withparts in section.

Fig. 3 is a fragmentary front view of the strap.

Fig. 4 is a view taken on line 4 4 of Fig. 3.

Fig. 5 is a view showing the relation of thelug and notch in the lens.

Fig. 6 is a front View of the resilient member.

A preferred embodiment of my invention is disclosed in the drawingwherein there is illustrated a spectacle I embodying a bridge IIconnecting the two lenses I2.` 4` Positioned rearwardly of each lens andextending along the upper peripheral portion thereof is a resilient armI3 having the lens holding devices I4 secured, respectively, on itsnasal and temporal end portions. The lens holding devices I4 at thenasal ends of arms I3 are attached to the bridge II while those at thetemporal ends of arms I3 carry the usual endpieces I for pivotally`supporting temples I6, all as is well understood by those skilled inthe art.

The lens holding device I4 comprises a member I1 which extends forwardlyfrom the arm I3 and terminates in a laterally extending strap I8 whichis adapted to engage the front surface of lens I2. The member Il alsocarries a lug I9 which extends between the strap I8 and the arm I3 andis positioned in a notch 20 formed in lens I2. Positioned between thearm I3 and the rear surface of lens I2 is a leaf spring 2| having anopening 22 with a reduced mouth 23 which cooperates with the narrow neck24 on lug I9 to hold the spring on the lug. As will be un- Gerhardllestad, Rochester:H Yggaasign-"to l VBausch, & ,Lomb Optical('10inpanyiRuchester,V

derstoodbn those.- skllled in 'the arathe spring 2i;y .be attachantelucia by slightly twisting one. of.. the. portions of mouth 23.yrelative to the other. or mesnil-inail :mar-he slid over the rear endafinar! before the` arm i3 is soldered to the rear face @tithe lua,- Y

.i2 hasanotch Zltormed. respectively, in its nasal and temporal edges toreceive the lugs I9 attached, respectively, to the bridge II andendpiece l5. It will be apparent that a lens I2 may be inserted in themounting by flexing the resilient arm I3 so as to further separate therespective ends of arm I3 and permit the lugs I9 to engage the notches20 in the lens. The resilience of the arm I3 will then hold the lugs I9in notches 20 so that the lens I2 is thereby detachably secured in themounting. The leaf springs 2 I, secured to each lug I9, normally tend tourge the lens I2 forwardly so that the front face of lens i2 engages thestrap I8. Hence, lenses of various thickness can be mounted on the lugI9 since the spring 2l yieldably urges the lens against the strap I8 andso compensates `for varying thicknesses of lenses. The lenses I2 arethereby resiliently held and will therefore be cushioned againstpossible. mechanical strain. The springs 2l preferably extend below thelugs I3 so as to yieldably support the lens and permit it to rockforwards and backwards since the lugs are slightly smaller than thenotches as shown in Fig. 5.

- From the foregoing, it will be apparent that I am able to attain theobjects of my invention and provide an improved ophthalmic mounting inwhich the lenses are detachably held by lugs extending forwardly fromarms positioned rearwardly of the lenses. Various modifications canobviously be made without departing from the spirit of my invention aspointed out in the appended claims.

I claim:

1. An ophthalmic mounting comprising a bridge; a lens having openings atthe nasal and temporal edge portions thereof; a resilient arm secured tothe bridge and extending from the nasal portion to the temporal portionof the lens, said arm extending along the upper peripheral portion ofthe lens and lying in a plane spaced rearwardly of the lens; lugsextending forwardly from theend portions of said arm, said lugsrespectively engaging the walls of said openings and being held thereinby the resilience of said arm, said openings being larger than thecrosssection of the lugs; a strap mounted forwardly of each lug andresilient means carried by each extending along the upper peripheralportion of the lens and terminating adjacent the notch in the temporalside of the lens, said armlyingim `.1.=:

a plane which is spaced rearwardulyi of the, lens; a lug extendingforwardlyfronijachferid*p tion of the arm, said lugs being'slightlyrplnithan said notches and respectively engaging the latter and beingretained therein: bythelresili ence of said arm; lens strapsmounted-@Lille forward ends of the lugsyand a spring'mem ber 1 carried lby each; A'eridfiportion foryieldably Y urgingf the iront surface'.l'off-'lthef lens .against Athe straps,V Vsaidl"m'enbe'r engagingfth'eylens .at only two spacedi points flecatedi--re'spectively aboveandbelowth lug-wherebythe lensmay be'yieldi 25 ably rocked forwards andbackwards. '1 Senna ophthalmic finounting" comprising` a bridge;V a lenshaving notches in its nasal and temporal edge portions; a resilient armhaving one end portion attached to the bridge, said arm extending alongthe upper peripheral por- V5 tion of the lens and terminating adjacentthe notch in the temporal side of .the lens, said arm lying in a planewhich is spaced rearwardly of thelens; a l lugfentending forwardlyfromeach end 10 cross-section than the notches, said lugs respecftivelyengaging the notches in the lens and being retained therein by theresilience of said arm; lens :straps mounted at the forward ends of thelugs; and `a leaf spring member carried .by *each'jendflortion' foryieldably urging the 'front rface of the lens against `the straps, eachspr'i'ng'membe having a notch with a reduced mmouthfl-forv receiving acorrespondingly shaped portion .on the adjacent lug for retaining the"2b member yin position, each member having only upperifandslowerfportions .engaging therear surface of the. lens, said-portions`'lying Y respectively ahovesand :below the lug .whereby the lens .isresiliently mounted and adapted to rock backwardsandf forwards Aagainstvthe tension of the springnmember'.4 l

GERHARDA. ELLESTAD.

